Shock-absorber for vehicles.



2 SHBETS-SHEET l.

Patented July 8, 1913.

45 A; hi

Jwty yuan 57% (M m ZW J. F. MAMET. SHOCK ABSORBER FOR VEHICLES. APPLICATION FILED MAR. 10, 1913 J. 1-". MAMET. SHOCK ABSORBER FOR VEHICLES.

APPLIOA'IION FILED MAR.10, 1913 1,066,933. Patented July 8,1913.

2 SHEETS SHEET 2 im/Wig? UNITE1) ST5ATES PATENT oF ioE.

yufimfl q nenoois MAMET, or BILLANCOURT, FRANCE.

SHOCK-ABSORBER FOR VEHICLES.

To all whom it may concern:

Be it known that I, JULIEN liRANgois MAMET, of 6 Rue Demiehs, Billancourt, Seine, Republic of France, aviator, have invented Improvements in and Relating to Shock-Absorbers for Vehicles, of which the following is a. full, clear, and exact descrip tion.-

The shock absorbers for the suspension'of vehicles at present in use present various in conveniences the principal of which are as follows: the considerable weight'nud volume of these devices, their rapid wear (ind the fact that they are speedily rendered uselessowing to the collapse of the springs.

The present invention has fort-its object a form of shock absorber enabling these defects to be obviated.

This shock absorber can jbefitted to all vehicles without the necessity for modifying the latter, and it affords the necessary flexibility to the suspension for absorbing both large and small shocks. Furthermore, it permits offth'e operation of the ordinary springs of the vehicle in case its elastic portion should break. p I i The present shockjabsorber. is formed by a double shackle constituted by two pairsof bent levers, pivoted at one of their extremities to the same pivot and united in pairs by other spindles upon which the leaf 4 springs of the suspe'nsi'on are mounted. The

other extremity of each pair .of levers receives a cross piece intended to serve as point of attachment for one or more spiral springsth'e position ofv these cross li'ieli'ibQl'S being adjustubleaccording to the load carried by the vehicle.

The invention isillustrzited by way of ex-.

ample in the accompanying drawing, in

in elevation. Fig.2 is a corresponding plan.

Fig. 3 i3 3. side elevation thereof. Fig. 4 shows the shock-absorber in use. Fig.

shows the position occupied by the shock absorber-mill, caseuits springs should break.

Fig. 6 showsin elevatione-this shock absorber provided...

it} itreinfor-eing device. Fig. 7 1s a side :vie. hereofi -lig. Sshows in section n glev ce-= servi ngl. to i einforce orstrengthen the openings receiving the bolts Specification of Letters Patent.

Paton mi July 8, 1913.

Application file'd March 10,1913. Serial Nd. 753,299.

connecting the springs to the apparatus. Fig. 9 illustrates in longitudinal section a tie-tube receiving the common axis cfliilierting the two pairs bent levers.

As shown in the drawing, the shock ubsorber comprises two pairs of 'bent levers a (fond 6b, the short arinsof whichnre of the same length and are pivoted upon of pivot 0 common to them both. The two lc vers a and a are connected one with the other on a level with their bent portion by a bolt d serving zislpoint of articulation for the extremity of the leaf spri iigs lllired upon the chassis of the vehicle. The levers b and (1 are also united on at level with their bent portion by a bolt 1: upon which the end i and 7) b are connected respectively one with the other by :1 cross member f and upon each of these members the end of one or more spiral springs g is mounted. Accord ing to the load to be carried by the vehicle and in order to permit of viir ying as demenibers f may occupydillerentpositions;

\Vitl this object openings'f" are formed in the long :irms of the leversa a and I) b; these openings fjserve forthe reception of the cross members f constituted by bolts.

With the object of maintaining the-normalintervzil. between the briinches of tl e' leversa and a and I) b and of preventing the sired the leverage of the levers, the cross 'slzickenin' of ,the nuts of the cross-members f, each 0 the latter is engaged in a spiral J spring It the convolutions of which are com-v pressed ,hetweei'i the branches of the lovers.

This device may be reinforced by :1 metal tube in which eiieh of the cross neinbersf is engaged and which is placed inside the spring h. When the vehicle is at rest,' the being mounted upon the bolts (1 and 9 re spectively uniting the levers a and a, and b and 6, also tend to separate the long arms of these levers. The spring or springs g thenagain become 0 erative and return the levers to their initia osition in absorbing the effect of the shock which is therefore not transmitted to the vehicle.

The present type of shock absorber presents numerous advantages, of which the principal are as follows 1. It can be fitted to vehicles of all kinds, like a simple shackle, without modification of the vehicle. 2. It is very strong and enables shocks of all kinds whether large or small to be absorbed. It keeps the vehicle always plumb and eliminates friction and conse'quentl wear that occurs in ordinary shock absor ers. 4. By reason of the position ccupied by the shock absorber (position represented in Fig. 4) and more particularly by the bolts serving as pivots-for the extremities of the leaf springs, the spring 9 works only when a shock occurs, in such a manner that this spring, not being subjected to a constant strain, retains all its flexibilit and does not become deformed. 5. The s ock absorber is able to withstand different or progressive weights without the necessity for lengthening or flattening its spring to render it harder, which destroys its flexibility. 6. As stated above,-the length of the lever arm of the apparatus can be regulated as desired by displacing the cross members f upon which the spring 9 is engaged, in accordance with the load to be supported by the vehicle, and this without altering the tension of this spring which acts equally well under a large load and under a small load. 7. Finally this type of shock absorber affords absolute security, because if the spring 9 should, break, it would act as a simple shackle, as will be seen by examining Fig. 5.

It should also be noted that the present shock absorber is extremely light as compared with apparatus of the same kind hitherto em loyed and that it cannot be affected like sai devices, by the action of dust or mud. Furthermore, all its parts are readily accessible and it can be speedily cleaned.

It should be understood that the method of attaching the spring 9 may vary as desired and that this spring presents astrength appropriate to the load to be carried n0rmally b the vehicle. Moreover, in order to strengthen the holes through which pass the bolts 6 d, these passages can be surrounded by rings a: serving as bearings for said bolts. These rings comprise a collar :22 fitted and set on one side in the double lever, while shoulder 22 locks this ring on the other side, as illustrated in Figs. 6, 7 and 8. A tietube 3 can also be provided, connecting the inner pair of levers and serving as bearings for 'the common axis 0. This tie-tube is constituted by a cylindrical middle part y two shoulders and two collars y fitted in the inner pair of double levers and then set in the latter, while a flat art prevents them from rotating. A milled perforation allows to lubricate the common axis 0 fitted in this tie-tube, as illustrated in Fig. 9. laims: 1. A jointed shock absorber for the suspension of vehicles of all kinds, characterized by two pairs of bent levers with unequal arms articulated u on a common spin dle, the extremities of t e long arms of the levers of each pair being united one with the other by cross members, the cross members uniting the long arms of each pair of levers being connected 'one with the other by one or more spiral springs, the bent (portions of each air of levers bein unite by bolts upon which the spring fixe to the vehicle body and the spring fixed to the axle are attached respectivel 2. A jointed shock a sorber for the suspension of vehicles of all ln'nds, characterized by two pairs of bent levers withunequal arms articulated u on a common spindle, the long arms of eac pair of levers resenting apertures into which cross mem ers can be introduced for modifying when desired the length of the lever arms according to'the load to be carried by the vehicle, the

cross members uniting the long arms of each pair of levers being connected one with the other byone or more spiral springs, the bent portions of each air of levers bein united by bolts u on w ichthe spring fixed to the vehicle be y and the spring fixed to the axle are attached .respectivel 3. A jointed shock absorber or the susension of vehicles of all kinds, character ized by two pairs of bent levers with i1nequal arms articulated upon a common spindle, the extremities of the long arms of the levers of each pair being united one with the other by cross members, the cross members uniting the long arms of each pair of levers being connected one with the other by one or more spiral sprin the bent portions of each pair of levers eing united by bolts upon which the spring fixed to the vehicle body and the sprin fixed tov the axle are attached respective y, and spiral springs passed upon the cross members, maintaining the normal interval between the long arms of the pairs of levers.

4. A jointed shock absorber for the sus-' the other by cross members, the cross members uniting the long arms of each pair of levers being connected one with the other by one or more spiral springs, the bent portions if nach pair of levers being united by bolts 1 provoments in and relating to shovk absorbupnn which the spring fixed to the vehicle ers for vehicles signed by 1110 this 25th day h sly and the swing fixed to the axle are of February, 1913.

Mina-lied resper-tively, and a stay-tube fitted JULIEN FRANQOIS MAMET. 5 (m the connnnn spindle connecting the two' \Vitnesses:

pairs of bent levers. LUCIEN ME'MMINGE,

Tim foregoing specification of my im- RENE THIRIOT. 

